Synthesis of 2-Alkylidenecyclopentanones via Palladium-Catalyzed Cross-Coupling of 1-(1-Alkynyl)cyclobutanols and Aryl or Vinylic Halides
作者:Richard C. Larock、Ch. Kishan Reddy
DOI:10.1021/ol000219i
日期:2000.10.1
The palladium-catalyzed cross-coupling of aryl or vinylichalides and 1-(1-alkynyl)cyclobutanols affords good yields of stereoisomerically pure 2-arylidene- or 2-(2-alkenylidene)cyclopentanones, respectively, by a process involving (1) oxidative addition of the organic iodide to Pd(0), (2) carbopalladation of the triple bond of the 1-(1-alkynyl)cyclobutanol, (3) regio- and stereoselective ring expansion
Microwave-Assisted Organocatalyzed Rearrangement of Propargyl Vinyl Ethers to Salicylaldehyde Derivatives: An Experimental and Theoretical Study
作者:David Tejedor、Leandro Cotos、Daniel Márquez-Arce、Mikel Odriozola-Gimeno、Miquel Torrent-Sucarrat、Fernando P. Cossío、Fernando García-Tellado
DOI:10.1002/chem.201503171
日期:2015.12.7
monocycles to complex fused polycyclic systems. The reaction is highly regioselective and takes place under symmetry‐breaking conditions. The preparative power of this reaction was demonstrated in the first total synthesis of morintrifolin B, a benzophenone metabolite isolated from the small tree Morinda citrifolia L. A DFT study of the reaction was performed with full agreement between calculated values and
Regio‐ and Stereoselective Synthesis of 2‐Hydroxymethyl‐1,3‐enynes by Rhodium‐Catalyzed Decarboxylative C−C Coupling
作者:Shi‐Chao Lu、Zhi‐Xin Chang、Yu‐Liang Xiao、Hong‐Shuang Li
DOI:10.1002/adsc.201901013
日期:2019.10.22
A regio‐ and stereoselective protocol for rhodium(I)‐catalyzeddecarboxylativeC−Ccoupling between propiolic acids and propargyl alcohols has been achieved. This efficient catalytic approach could facilitate the preparation of a diversity of synthetically valuable 2‐hydroxymethyl‐1,3‐enynes with high Z‐stereoselectivity. Notably, non‐terminal alkynes were smoothly transformed into the target products
Dirhodium(II) Carboxylate Catalyzed Formation of 1,2,3-Trisubstituted Indoles from Styryl Azides
作者:Crystalann Jones、Quyen Nguyen、Tom G. Driver
DOI:10.1002/anie.201308611
日期:2014.1.13
Dirhodium(II)‐carboxylate complexes were discovered to promote the selective migration of acyl groups in trisubstituted styryl azides to form 1,2,3‐trisubstituted indoles. The styryl azides are readily available in three steps from cyclobutanone and 2‐iodoaniline.
Synthesis of 2-Alkylidenecyclopentanones via Palladium-Catalyzed Carbopalladation/Ring Expansion of 1-(1-Alkynyl)cyclobutanols
作者:Richard C. Larock、Ch. Kishan Reddy
DOI:10.1021/jo010577e
日期:2002.4.1
The palladium-catalyzed cross-coupling of aryl halides or vinylichalides or triflates and 1-(1-alkynyl)cyclobutanols affords good yields of stereoisomerically pure 2-arylidene- or 2-(2-alkenylidene)cyclopentanones, respectively. The process involves (1) oxidative addition of the organic halide or triflate to Pd(0), (2) regioselective, intermolecular carbopalladation of the carbon-carbon triple bond